#13 Aleister Black
It's obviously way too early to tell how Aleister Black will be treated on the main roster, and I don't think they should move him up any time soon. I think that NXT has a lot of great talent right now, and its best to keep them all in that pot gaining flavor and momentum.
Black isn't needed on the main roster right now, so moving him up may result in him being pushed aside like most of the NXT Champions were.
When I started writing this article I wasn't sure if the NXT Championship was a blessing or a curse but now that I've gone through them all, I think that it has acted more like a curse. That is not to say that The Undertaker is up to some dark magic or anything, just that by putting too much attention and stock in a wrestler that early in their WWE run tends to set an expectation that the WWE isn't always able to live up to.
The main roster is loaded right now to the point where there aren't enough good spots for everyone to get a chance. Until more of the older talent move out of the way every division is full.